composed of long, narrow cells with less protoplasmic contents are developed in 
the continuity of the primary ones. They form later at their upper end fasciculated 
branches reminding one of the peripheral assimilative filaments in the older frond. 
The author named supposes that such thin 
erect filaments may meet and twist together, 
thus giving rise to an erect frond. I have not 
observed the species in this stage of develop- 
ment. In February at Gilleleje I found crusts 
apparently formed by densely united creeping 
filaments like those described by Miss CHESTER, 
but almost no erect filaments were observed. 
Young plants with the normal structure are 
shown in fig. 68; the assimilative filaments were 
only less numerous in the lower part of the 
plants than later. 
The assimilative filaments terminate in hya- 
line hairs of various length, generally rather 
short. The shortest are almost entirely filled 
with protoplasm, while in the longer the pro- 
toplasm with the nucleus is concentrated in 
14 
> 
œ 
Fig. 68. 
Nemalion multifidum. Young plants from the mole 
at Gilleleje, November 1902. C.33:1. 
the upper end, the rest of the cell containing only a thin parietal layer. When a 
hair dies a new one is often formed at the same place from the subjacent cell: 
the lower part of the old membrane remains however 
Ey of the assimilative 
WOLFE. 
5 surrounding the base of the new hair as a sheath. A 
3 new hair may also be formed beside and below the ter- 
minal one, and this may also be renewed (fig. 69). 
The antheridial branches form clusters at the ends 
filaments as described by Borner 
and THURET (1867) and Wozre. Each cell in the an- 
i theridial branch gives rise to four antheridia or fewer 
bi (fig. 70). The spermatogenesis has been worked out by 
The carpogenic filaments are terminal on the assi- 
milative filaments and usually 3-celled, (according to 
WOLFE 2- to 5-celled). Concerning the fertilization and 
the development of the cystocarp reference may be 
Fig. 69. made to the quoted papers of Borner and THURET, 
Nemalion multifidum. End-cells of JanczEwski, SCHMITZ, WILLE and WoLFE. The fertilised 
assimilative filaments with hairs; in 
D the nucleus is visible. 60:1.  Carpogonium divides by a transverse wall into a basal 
or placental cell, remaining undivided, and an upper 
cell dividing by vertical walls into a number of cells giving rise to branched spo- 
rogenous filaments, the end-cells of which produce carpospores. 
D. K. D. Vidensk. Selsk. Skr., 7. Række, naturvidensk. og mathem. Afd. VII. 1. 19 
